Sleep & CPAP Report — 2026-09-18
🚩 Flags
- AHI 0.87 — below-baseline vs 30d avg 2.12 (-59.1%). 7d avg 2.38 (-63.5%). OA count 5 vs 7d avg 12.00. H count 1 vs 7d avg 2.00. CA count 0. RERA count 0.
- Leak_90 0.00 L/min — below baseline vs 30d avg 2.00 (-100.0%). Leak_Avg 0.18 (7d 0.54); Leak_Max 8.4 (7d 16.8).
- Sleep architecture: Deep% 11.51 (-14.1% vs 7d, -13.5% vs 30d); REM% 23.16 (-2.5% vs 7d, -3.6% vs 30d); Awake 10.54 min (+26.5% vs 7d, +20.7% vs 30d); Efficiency 97.36%.
- Time in bed 398.4 min (6h 38.4m) — on trend vs 30d 388.0 (+2.7%). Total sleep 387.9 min. CPAP usage 6.87h.
Summary Table — Night of 2026-09-18
| Metric |
Value |
| Sleep start |
2026-09-18T22:50:53-06:00 |
| Time in bed |
398.4 min (6h 38.4m) |
| Total sleep |
387.9 min (6h 27.9m) |
| Sleep efficiency |
97.36% |
| Awake time |
10.54 min |
| Core (N1+N2) sleep |
253.4 min / 65.33% |
| Deep (N3) sleep |
44.66 min / 11.51% |
| REM |
89.82 min / 23.16% |
| CPAP usage hours |
6.87 |
| Session count |
1 |
| AHI |
0.87 |
| RDI |
0.87 |
| Obstructive apneas (OA) |
5 |
| Hypopneas (H) |
1 |
| Central apneas (CA) |
0 |
| Unclassified apneas (UA) |
0 |
| RERA |
0 |
| Pressure_Avg |
7.07 |
| Pressure_Min |
4.00 |
| Pressure_Max |
12.16 |
| Pressure_90th |
9.56 |
| Leak_Avg |
0.18 |
| Leak_Max |
8.4 |
| Leak_90th |
0.0 |
| FL_Avg |
0.0161 |
| FL_P95 |
0.09 |
| FL_Max |
0.49 |
| Min_Above_005 |
42.7 |
| Min_Above_010 |
16.4 |
| Min_Above_020 |
2.9 |
| Frac_NonZero (FL samples) |
29.68% |
Comparison to Trailing Averages
| Metric |
Tonight |
7d avg |
30d avg |
Δ vs 7d |
Δ vs 30d |
| AHI |
0.87 |
2.38 |
2.12 |
-63.5% |
-59.1% |
| OA count |
5.00 |
12.00 |
10.43 |
-58.3% |
-52.1% |
| H count |
1.00 |
2.00 |
2.53 |
-50.0% |
-60.5% |
| CA count |
0.00 |
1.43 |
1.00 |
-100.0% |
-100.0% |
| RERA count |
0.00 |
0.71 |
0.80 |
-100.0% |
-100.0% |
| Pressure_Avg |
7.07 |
7.30 |
7.43 |
-3.1% |
-4.8% |
| Pressure_90 |
9.56 |
9.83 |
9.95 |
-2.7% |
-4.0% |
| Leak_Avg |
0.18 |
0.54 |
0.74 |
-66.4% |
-75.8% |
| Leak_Max |
8.40 |
16.80 |
16.92 |
-50.0% |
-50.4% |
| Leak_90th |
0.00 |
1.37 |
2.00 |
-100.0% |
-100.0% |
| Usage hours |
6.87 |
6.45 |
6.56 |
+6.5% |
+4.7% |
| FL_P95 |
0.090 |
0.087 |
0.095 |
+3.3% |
-5.6% |
| Min_Above_010 |
16.40 |
14.74 |
17.28 |
+11.2% |
-5.1% |
| Min_Above_020 |
2.90 |
4.43 |
4.04 |
-34.5% |
-28.2% |
| Awake min |
10.54 |
8.33 |
8.73 |
+26.5% |
+20.7% |
| TIB min |
398.43 |
382.16 |
387.96 |
+4.3% |
+2.7% |
| Total sleep min |
387.89 |
373.83 |
379.24 |
+3.8% |
+2.3% |
| Deep % |
11.51 |
13.40 |
13.32 |
-14.1% |
-13.5% |
| REM % |
23.16 |
23.75 |
24.02 |
-2.5% |
-3.6% |
| Core % |
65.33 |
62.86 |
62.67 |
+3.9% |
+4.2% |
Week-over-Week Deltas (recent 7d 2026-09-12–2026-09-18 vs prior 7d 2026-09-05–2026-09-11)
| Metric |
Recent 7d |
Prior 7d |
Δ |
Δ % |
| AHI |
2.146 |
2.027 |
+0.119 |
+5.8% |
| OA |
10.857 |
9.429 |
+1.429 |
+15.2% |
| CA |
1.429 |
1.000 |
+0.429 |
+42.9% |
| Pressure_Avg |
7.369 |
7.187 |
+0.181 |
+2.5% |
| Leak_Avg |
0.473 |
0.683 |
-0.210 |
-30.8% |
| Leak_90 |
1.371 |
1.543 |
-0.171 |
-11.1% |
| Deep % (Apple) |
13.31 |
11.06 |
+2.25 |
+20.3% |
| REM % (Apple) |
24.00 |
22.52 |
+1.48 |
+6.6% |
| Awake min (Apple) |
8.33 |
9.68 |
-1.35 |
-13.9% |
| Sleep min (Apple) |
378.45 |
367.01 |
+11.44 |
+3.1% |
| FL_P95 |
0.093 |
0.089 |
+0.004 |
+4.8% |
| Min_Above_010 |
15.814 |
15.657 |
+0.157 |
+1.0% |
| Min_Above_020 |
4.500 |
3.671 |
+0.829 |
+22.6% |
Recent 10-Night Context
| Date |
AHI |
OA |
CA |
PAvg |
P90 |
LAvg |
LMax |
L90 |
FL_P95 |
MinAbv010 |
MinAbv020 |
Deep% |
REM% |
Awake |
| 2026-09-09 |
1.40 |
7 |
1 |
7.68 |
10.52 |
0.63 |
13.2 |
1.2 |
0.11 |
20.5 |
4.8 |
15.10 |
29.01 |
2.51 |
| 2026-09-10 |
2.10 |
10 |
3 |
7.14 |
9.30 |
0.14 |
7.2 |
0.0 |
0.07 |
9.7 |
1.4 |
11.44 |
20.34 |
7.02 |
| 2026-09-11 |
2.53 |
13 |
0 |
6.57 |
9.52 |
0.62 |
24.0 |
0.0 |
0.05 |
8.9 |
2.4 |
11.97 |
21.87 |
10.54 |
| 2026-09-12 |
1.81 |
8 |
1 |
7.17 |
9.92 |
0.45 |
14.4 |
1.2 |
0.08 |
12.7 |
3.9 |
— |
— |
— |
| 2026-09-13 |
2.60 |
14 |
1 |
7.78 |
10.16 |
0.47 |
18.0 |
0.0 |
0.11 |
19.1 |
7.6 |
18.06 |
27.63 |
9.53 |
| 2026-09-14 |
2.55 |
12 |
2 |
7.43 |
10.26 |
0.86 |
27.6 |
4.8 |
0.10 |
15.8 |
4.1 |
14.93 |
21.67 |
3.01 |
| 2026-09-15 |
1.93 |
10 |
0 |
7.76 |
10.02 |
0.74 |
14.4 |
2.4 |
0.12 |
21.2 |
6.9 |
12.66 |
24.62 |
8.53 |
| 2026-09-16 |
2.85 |
16 |
4 |
7.20 |
9.68 |
0.09 |
8.4 |
0.0 |
0.08 |
13.5 |
2.8 |
9.37 |
22.95 |
10.04 |
| 2026-09-17 |
2.41 |
11 |
2 |
7.17 |
9.22 |
0.52 |
10.8 |
1.2 |
0.07 |
12.0 |
3.3 |
— |
— |
— |
| 2026-09-18 |
0.87 |
5 |
0 |
7.07 |
9.56 |
0.18 |
8.4 |
0.0 |
0.09 |
16.4 |
2.9 |
11.51 |
23.16 |
10.54 |
CPAP → Sleep-Stage Correlations (all 75 matched nights)
Correlations computed across full available history (2026-06-23 → 2026-09-18).
| Pair |
the user r |
Interpretation |
| AHI vs deep_pct |
+0.114 |
weak positive |
| AHI vs awake_min |
+0.037 |
negligible |
| OA vs awake_min |
+0.057 |
negligible |
| CA vs deep_pct |
+0.076 |
negligible |
| Leak_Avg vs deep_pct |
-0.143 |
weak negative |
| Leak_90th vs deep_pct |
-0.179 |
weak negative |
| Leak_Max vs awake_min |
+0.072 |
negligible |
| FL_P95 vs awake_min |
-0.092 |
negligible |
| Min_Above_010 vs deep_pct |
-0.029 |
negligible |
Bucket comparison (Leak_90 median split, median = 2.4):
- Low-leak nights (n=37): mean deep% 15.09, awake 14.65 min
- High-leak nights (n=38): mean deep% 13.84, awake 13.98 min
- Δ (high – low): deep% -1.26 pp, awake -0.66 min
Caveats
- Sleep session started at 2026-09-18T22:50:53-06:00 — matched to the 2026-09-18 CPAP file (same-calendar-date convention).
- Apple Watch SpO2/pulse channels not present in current CPAP CSV export.
- Correlations are directional/small-effect only — single-night deviations often exceed what correlations alone would predict.
- All flagged metrics remain within clinically safe ranges (AHI < 5, leak within mask spec); flags mark deviations from the user's own recent baseline, not clinical thresholds.
- Duplicate
2.json / 3.json health-report files (iCloud dedup artifacts) are ignored in favor of the primary copy.
- Matched-night count is 75. Early 2026-06 nights (via multi-day roll-up) have zero-valued pressure/leak channels and remain low-confidence for CPAP metrics prior to ~2026-06-22.